// Make the div behave like a button
.btn-group,
.btn-group-vertical {
   position: relative;
   display: inline-flex;
   vertical-align: middle; // match .btn alignment given font-size hack above

   > .btn {
      position: relative;
      flex: 1 1 auto;
   }

   // Bring the hover, focused, and "active" buttons to the front to overlay
   // the borders properly
   > .btn-check:checked + .btn,
   > .btn-check:focus + .btn,
   > .btn:hover,
   > .btn:focus,
   > .btn:active,
   > .btn.active {
      z-index: 1;
   }
}

// Optional: Group multiple button groups together for a toolbar
.btn-toolbar {
   display: flex;
   flex-wrap: wrap;
   justify-content: flex-start;

   .input-group {
      width: auto;
   }
}

.btn-group {
   @include border-radius($btn-border-radius);

   // Prevent double borders when buttons are next to each other
   > :not(.btn-check:first-child) + .btn,
   > .btn-group:not(:first-child) {
      margin-left: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }

   // Reset rounded corners
   > .btn:not(:last-child):not(.dropdown-toggle),
   > .btn.dropdown-toggle-split:first-child,
   > .btn-group:not(:last-child) > .btn {
      @include border-end-radius(0);
   }

   // The left radius should be 0 if the button is:
   // - the "third or more" child
   // - the second child and the previous element isn't `.btn-check` (making it the first child visually)
   // - part of a btn-group which isn't the first child
   > .btn:nth-child(n + 3),
   > :not(.btn-check) + .btn,
   > .btn-group:not(:first-child) > .btn {
      @include border-start-radius(0);
   }
}

// Sizing
//
// Remix the default button sizing classes into new ones for easier manipulation.

.btn-group-sm > .btn { @extend .btn-sm; }
.btn-group-lg > .btn { @extend .btn-lg; }


//
// Split button dropdowns
//

.dropdown-toggle-split {
   padding-right: $btn-padding-x * .75;
   padding-left: $btn-padding-x * .75;

   &::after,
   .dropup &::after,
   .dropend &::after {
      margin-left: 0;
   }

   .dropstart &::before {
      margin-right: 0;
   }
}

.btn-sm + .dropdown-toggle-split {
   padding-right: $btn-padding-x-sm * .75;
   padding-left: $btn-padding-x-sm * .75;
}

.btn-lg + .dropdown-toggle-split {
   padding-right: $btn-padding-x-lg * .75;
   padding-left: $btn-padding-x-lg * .75;
}


// The clickable button for toggling the menu
// Set the same inset shadow as the :active state
.btn-group.show .dropdown-toggle {
   @include box-shadow($btn-active-box-shadow);

   // Show no shadow for `.btn-link` since it has no other button styles.
   &.btn-link {
      @include box-shadow(none);
   }
}


//
// Vertical button groups
//

.btn-group-vertical {
   flex-direction: column;
   align-items: flex-start;
   justify-content: center;

   > .btn,
   > .btn-group {
      width: 100%;
   }

   > .btn:not(:first-child),
   > .btn-group:not(:first-child) {
      margin-top: calc(#{$btn-border-width} * -1); // stylelint-disable-line function-disallowed-list
   }

   // Reset rounded corners
   > .btn:not(:last-child):not(.dropdown-toggle),
   > .btn-group:not(:last-child) > .btn {
      @include border-bottom-radius(0);
   }

   > .btn ~ .btn,
   > .btn-group:not(:first-child) > .btn {
      @include border-top-radius(0);
   }
}
